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Patent US2835663A successfully refreshed from Google Patents.
US2835663A
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US
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Copperable disazo dyestuffs
Assignee: Saul and Co
•
Filing: 1955-05-19
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Granted: 1958-05-20
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Expires: 1975-05-19
Abstract
No abstract record available.
Inventors
- 👤 Benz Jakob
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:18
CPC Classifications
C; C09; C09B; C09B33/00; C09B33/02; C09B33/08; C09B33/10; C09B62/00; C09B62/02; C09B62/04; C09B62/08; C09B62/095
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
9 words
THE COPPERABLE DISAZO DYESTUFFS WHICH CORRESPOND TO THE FORMULA
Claim 2
Dependent Claim
9 words
THE COPPERABLE DISAZO DYESTUFFS WHICH CORRESPOND TO THE FORMULA
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-19 | 1961-11-18 | 1962-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-19 | 1965-11-18 | 1966-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-19 | 1969-11-18 | 1970-05-20 | $7700.00 | Window Closed / Lapsed |